Transmission



A. H. JESSEN TRANSMI S S I ON `Ilan. 14, 1930.

Filed Nov. 14, 1925 2 Sheets-Sheet N e R Y .v n m un. W A A. H w

u. g Y Q N 0M, EM u J ELN A. H. JESSEN l TRANSMISSION Jan. .14, 1930.

' Filed Nov. 14, 1925 2 sheets-sheet 2 A. H. JE|S`80N INVENTOR.

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Patented Jan. 14, 1930 UNITED STATES DATENT QFFSE .ARNOLD H. JESSEN, OF LOS ANGELES, CALIFORNIA TRANSMISSION Application filed November 14, 1925. Serial No. 69,140.

My invention relates to transmission mechnism which is simple in character, durable, anisins in general, and more particularly to thoroughly efhcient and reliable in operation, those used in connection with motor vehicles, easy and inexpensive to manufacture, not easy or any mechanism in which it is desired to to get out of order, composed of a minimum 5 provide for changes in speed, increased or number of parts, and one which will elfectivedecreased, a reverse movement by means of ly produce the objects intended. planetary action, as well as a brake applica- Further objects and advantages of my intion thereof. vention will become more apparent as the devIt accordingly is an object of my invention scription thereof proceeds.

10 to provide a set of members, preferably in Reference is had to the accompanying un the shape of conical drums, one of which comdrawings, in which similar reference characprises a planet carrier and has associated ters denote similar parts. In the drawings, therewith a set of planet pinions adapted to Fig. 1 is a longitudinal sectional view of coact with sun gears positioned on drive and my improved transmission mechanism, cer- 5 driven shafts actuated at predetermined setain parts of the clutch member being shown 5 lective speeds, three or more in number, to in different positions, the different posit-ions provide for acceleration or reduction in speed, of the operating members for said clutch beto provide for reverse movement, and also ing shown in dotted lines,

to make eifective brake application when re- Fig. 2 is a fragmentary cross sectional view quired, of a modiiica-tion in which a brake drum is To Another object of my invention is to proassociated with one 0f the conical members vide a novel form of clutch member associated of my invention,

with my improved transmission mechanism, Fig. 3 is a fragmentary cross sectional, and

said clutch member being preferably of the more or less diagrammatic showing of the slidable type, and having associated thereconical members, and the positions they ocis with sets of devices for rendering said Iclutch Cupy, and the operating devices for the clutch member effective for locking and unlocking when the transmission mechanism is being certain appliances associated with said trans- Operated in low gear,

mission mechanism, said devices coinprisinga Fig. 4 1S a similar view showing the va- 30 set of cams and cam surfaces, and a sst 0f rious parts when the mechanism is being sa locking members adapted to coact therewith, Operated at intermediate speeds,

said devices being in the form of suitably con- Fg- 5 is 2 1 Similar view showing the parts structsd balls, l in the position for reverse movement,

Itis also within the province of my inven- Flg- 6 1S a Similar view showing the position to equip one of the conical members astion of the various parts when the mechanism s.; sociated with my improved transmission 1S 1I1 neutral position,

mechanism with a brake application means, Fig. 7 is a similar View illustrating the posiprefsmbly in the shape of a brake drum tion of the various parts when brake applicaadapted intermittently to be operated by a lO111SmaCle,21nd

i0 set of devices associated with my improved Fig. 8 is a similar view of the various parts to clutch. as applied to the modilication shown in Itis also within the province of my inven- Fig. 2. tion to provide a set of novel appliances as- Describing my invention more in detail, it

sociated with one 0f the pedals of a motor veis my object to provide a novel form of transhicle and a lever, which appliances are also mission mechanism more especially adapted 95 associated with my novel form of clutch, to to be used in connection with motor vehicles, render. the same operative as desired or but it is by no means to be limited to such, needed. for in practice it may be used in connection A still further object of my invention is to with line shafting and the like, and wherever provide a novel form of transmission mechaand whenever any change of speed as well as a reverse movement or brake application are required.

As seen more particularly in Fig. 1, I provide a casing C equipped With removable covers 1 and 2 associated With said casing in any manner found in practice to be desirable, for the purpose of providing access to the parts and for the purpose of dismantling.

Suitably journaled Within the cover 1 is a motor drive shaft 7 also journaledwithin a bearing B vassociated'vr/"ith the 'universal joint of the vehicle, or with any other support, depending upon the structure With Which my inventien is associated. Positioned Within the casing or housing@ is a set of cones or conical members 8, 9, and '10, the cone-or conical drum 10 comprising Van intermittently revolving and stationary member, to'be operatedlin'the manner presentlyto bede-scribed. The conical drum 9 comprises a'pedal yoperated stationary drum, that is Ytosa'yit does not rotate, ibut `may intermittentlyb'e actuated 'by the conventional larms -`11 shown in dotted lines in F ig. 1, Which'hotvever forins'no 'part of -my invention, and fany other suitable y'eperating mechanism `may be'substituted :ther-efor. The drumS or vplanet carrier yis KAintermittently revolving, and houses the fpl-anet pinions ,t, z5 which falso maybe ofconventional form, and Which'Willpresentlylbe moreY particularly' described.

Thefshaf-t is the driven shaft, said vshaft being driven through the transmission mechanisrn by the drive 'shaft `7, operated by the engine'or motor asso'ciated'tvith the vehicle or any other "shaftthespeed of Whichfis desired to be transmitted to the shaft 33, and means for ce'uplinglthe'shaft 7 -tvith said motor 'bei-ng provided. YThe drivenshaftBS turns in suitablebearings -12,"preferably`of t-he'balltype, though any other "form Vmay `be `substituted therefor. Aslidable clutch 1'3 is adapted 'to slide on the shaft 33, which shaft is equipped with circumferentially arranged cavities or depressions 14 of any preferred number, in which are positioned'ballsv or other devices 15, said lshaft 33 being tubular at its inner end, and equipped With 'an' offset tubular portion V16, which portion 'is also 7provided with cavities 17 similar'to'the cavities 14 and containing balls or other devices 18. l

A tubular lovv gear shaft 31 has one end reduced so as to accommodate a'ivearb'ushing or keyed to the conical drum 10 by means of the key 22.

Either integral with the low gear shaft 31, or associated therewith in any manner preferred, is a low drive sun gear 30 having any preferred number of teeth, but of a number to mesh with the teeth of the intermediate planet pinion The dive shaft 7 is equipped with a main drive pinion m, and a stub shaft 23, preferably integral with the drive shaft 7 is journalled Within `th`e tubular low gear shajfft 31. Associated With the tubular intermediate gear shaft 43, and preferably integral therewith, is an intermediate drive sun gear 42, in mesh with the inner intermediate planet pinion t, suitable ball bearings, if desired being `provided for all the gears. Such ball bearings are indicated .at 24.

The cone 8 is equipped with 'a tubular being provided for all the gears. Such ball shaft 48, a Wearbushing y26 being positioned in'betWeen, `and the planet-pinions ,'t landty are positioned Within said cone or vconical member or planet'carrierS, a closure 27 being provided on the casing or housing which 'closure is equipped Withopenings '28 to permit a thorough lubrication of the parts and bearings. Suitable lpassages 29 'insai'd casing-are Aalso provided for the same purpose. vSaid casing vand the Wear bushing may also be equipped Withone or more holes 84 fora similar "purpose,

IThe slida'ble vclutch 1311s 'provided `with a cut-away portion lor groove BGto-receivethe embracing end of an operating lever y1L, or said end maybe lpivoted thereto orl other- Wise associated therewith asin practice preferred. VASaid clutch is also` equipped Withan outer clutch camo, and amiddle clutch cam 0, an inner clutch cam z' being 'also 'positioned thereon. Juxtaposed to said cams are cut-away portions forming'an Louter clutch cam surface 0, and inner clutch cam surface'i, Which cams and cam surfaces arel adapted to coact With'the'balls 15 to'lo'ck and unlock .the various gear shafts in the manner presently to be described.

rhe lever or other manually operated .device Lis pivotedat 42 to an operatingelement or link 44, equipped With a suitable projection 46, intermittently adapted to engagezwith a notch or other device 45 formedv inthe meinberl40 ofa toggle 41, the'member 39 of 'which has pivote'd thereto a link or other connection 38 secured in any preferred manner to the arm of the pedal P. Y As hereinbefore eXplainechgthe drum Aor planet carrier 8 houses. the planetgpinio'ns, and is intermittently revolving and stationary. The drum 9 the brake drum,operated bythe brake pedal onlygand through theconnection 11. The drum 9 is stationary until moved by the brake pedal to applyfbraking action vvbetweenV` said drum 'andthe Vfdrum- 10.A Bringing the drums 8 and 9 into Contact provides for low gear operation. This is also true of intermediate gear operation, and neutral position, when the shafts are all free. Bringing the drum 9 into contact with the druml() also provides for reverse movement, the action of the clutch, pedal P and lever L for this purpose to be presently explained. In the form shown in Fig. 1, high speed is attained by causing the drums S and to revolve, also to be presently described.

Low gear With the balls of the clutch in engagement with the cavities 14, the middle clutch cam 0 in engagement with said balls, movement is maintained from the driven shaft 33, the drum 10 revolving, to the motor drive shaft 7, hrough the main pinion m, planet pinion t, which rotates with planet pinion t', low drive sun gear 30, tubular low gear shaft 31, clutch cam 0, and driven shaft 33, the drum 8 being stationary. The position of the parts is diagrammatically indicated in Fig. 3.

Intermediate gear Drum 8 stationary, drum 10 revolving. The parts in position as indicated in Fig. 4. The movement is maintained between motor drive shaft 7, main drive pinion m, planet pinion t (t, and 31 inactive) planet pinion intermediate drive gear 42, tubular intermediate gear shaft 43, inner clutch cam z', and driven shaft 33.

Reverse High gear lVhen the form of invention shown in Fig. 1 is used, high gear is maintained between drive shaft 7, main drive pinion m, direct drive to driven shaft 33, the drums 8 and 10 revolving, the clutch cams o and t' locking the balls 15 and 18 in position to lock the shafts 31 and 43. The pedal kP and the clutch lever 3T in this case L:re in engagement by means of the projection 46 and notch 45.

Nea-tml In this case the clutch balls are positioned within the cam surfaces I and O, the drum 9 engaging the drum 8, which is held stationary, the drum 10 revolving the gear 42 with its shaft 43, 'planet pinions t, t, t, and the shaft 7.

Bra/ZJ@ The pedal P causes the drum 9 to hold the drum 1() stationary, the clutch cam 2T locks the shaft 43 to the shaft 33, the drum 8 revolving with the planet pinions through the sun gear 42 shaft 43 and shaft 33.

In the form shown in Fig. 2, l have provided a form of my invention in which it is possible to obtain a high speed gear shift no matter what position the balls or gears may be in, by a simple manipulation. This feature is attained in the previously described form of my invention by placing the conical drums 8 and 9 in locked engagement. This form of my invention operates well in practice, but not quite so automatic as the forni shown in Figs. 2 and 8.

In this form of my invention I have again provided the three conical drums 8', 9, and 10. The drum 8 however, housing the planet pinions, is of a modified construction, having integral therewith a tubular extension c in which is positioned a more or less conventional brake drum construction. A pair of conventional brake shoes a provided with the usual springs for resisting the movement of the locking cams 0, which may be of conventional form, such as commonlyV associated with the brakes on the rear wheels of a motor vehicle, but are actuated in a novel manner, and by a novel construction. The brake shoes s are equipped with the usual brake lining Z to provide engagement with the tubular ei:- tension e when the drums 8 and 10 are brought into contact. This permits a movement in high gear, and a direct drive between the shafts 7 and 33.

The cam c is either integral with or associated in any manner preferred with an operating rod r, associated in any preferred manner with the sleeve m. Adjustably associated with said sleeve, and screw-threaded for this purpose, is a trip cam pawl 21) adapted to be engaged and operated for a twisting movement by the cam 1 said pawl having its cam engaging end rounded for this purpose. By moving the clutch 13 toward the drums by any means in practice preferred, the cam y will engage with the pawl p', causing a twisting action of the rod r, and hence a turning of the cam c. This action will cause the brake shoes s to engage through its brake lining with the tubular extension c, bringing the drums 8 and 10 into engagement, the pawl p entering the groove or depression (Z, and thus locking the drums 8 and 10 together, irrespective of the position of the balls 15 and 18. It will of course be understood that the upper half only of this form of my invention, and removed from the casing, has been illustrated. The remaining construction of this form of my invention is precisely the same as that hereinbefore described.

In Fig. 8, the pedal P with its pivot 37',

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link 38 toggle 41, with its members 89 and 40 and the notch 45 are precisely the same as previously described. The lever L with its pivot 42, member 44 and projection 46 are also the same. rllhe remaining construction is precisely that as described in connection with F ig. 2, the lower half merely being illustrated.

Vhile I have thus described my invention with great particu'larity, it will be obvious that the same may be modified throughout a wide range. l accordingly do not propose to be limited to the exact details of construction shown and described, but reserve the right in practice to make any and all modifications thereof that fall within the scope of the appended claims.

I claim as my invention:

l. In a transmission mechanism, a driving shaft having a pinion thereon, means for con-v necting said shaft to a source of power, a planet carrier having three 'interconnected planet pinions, one of which meshes with the pinion on the driving shaft, two sun gears meshing with the other planet pinions, brak ing means for controlling therotation of said planet carrier or one of the sun gears, a driven shaft, and ball clutches for connecting either of the sun gears to the driven shaft.

2. In a transmission mechanism, a driving shaft adapted to be driven by a source of power, a pinion on said driving shaft, a conical planet carrier having three interconnected planet pinions, one of which is in mesh with said pinion, two sun gears in mesh with the other planet'p'inions, a conical brake drum for controlling the rotation of said planet carrier, concentric tubular shafts adapted to be selectively driven by said sun gears, a third conical drum keyed to the outer of said tubular shafts, a driven shaft, clutch means for selectively connecting said tubular shafts to said driven shaft, and means associated with said brake drum for selectively controlling the rotation of said planet carrier or said third drum.

3. In a transmission mechanism, :a driving` shaft having a pinion thereon, said shaft being adapted to be driven by a source of power, a planet carrier having three interconnected planet pinions, one of which meshes with the pinion on said driving shaft, said planet carrier having also a tubular extension thereon, braking means, two concentric 'tubular shafts adapted to 'be rotated within said extension, a sun gear on each of said tubular .shafts meshing with the other of said pinions, a drum keyed to the outer of said tubular shafts, a driven shaft, a slidable clutch means for connecting either of said tubular shafts with said driven shaft, and means for Voperating said'braking means so that it will selectively control the rotation of said planet carrier or said drum.

4. In a transmission mechanism, a driving shaft, a pinion on said shaft, a set of concentric tubular shafts in alignment with said driving shaft, a driven shaft in alignment with said tubular shafts, sun gears on two of said tubular shafts, a planet vcarrier mounted on .the outer of said tubular shafts, said planet carrier having three interconnected pinions, one of which is in mesh with vthe pinion on said driving shaft, the other of said pinions meshing with said sun gears, a transmission drum keyed to the outer of said tubular shafts, a longitudinally shiftable braking means, said means being adapted selectively to control the rotation of said planet carrier or said transmission drum, and a longitudinally movable clutch surrounding said driven shaft and said outermost tubular shaft for connecting either of said shafts to said driven shaft.

5. ln a transmission mechanism, a drive shaft adapted to be actuated by a source of power, said ,drive shaft having thereon a pinion, a pair of concentric tubular shafts in alignment with said drive shaft, a sun gear on the innermost end of each of said tubular shafts, a planet carrier adapted for rotation on the outermost of said tubular shafts, said planet carrier having three interconnected planet pinions, one of which meshes with the pinion on said drive shaft, a transmission drum keyed to said outermost tubular shaft, braking means, the braking means and transmission drum being positioned in overlapped rela-tion, said braking means being Vadapted selectively to control `the rotation of said planet carrier or said transmission drum, a driven shaft having rtubular portions overlapping both of said tubular shafts, and a clutch for selectively connecting said driven shaft to either of said tubular shafts.

6. A driving shaft, a driven shaft having a sleeve provided with ball apertures, two members concentric with the sleeve and having depressions adapted to receive said balls, means to drive the two members from the driving shaft at different speeds, and cam means for forcing the ballsinto the depressions in either of the two members.

7. In a transmission mechanism including a driving shaft havingapinion thereon, said driving shaftbeing adapted to be driven by a source of power, a planet carrier having three inter-connected planet pinions, one of which meshes with the pinion on the driving shaft, two sun gears meshing with the other planet pinions,' of a high speed driving mechanism comprising a tubular extension projecting from the planet carrier, clutching means in said extension for controlling the rotation of ther lpla-net carrier to provide for high speed drive, said clutching means comprising a band, a cam adapted to engage said band, a rod for operating said cam, pivoted means for operating said rod, slidable means for open ating said pivoted means, a driven shaft, and

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a clutch for connecting either of the sun gears to the driven shaft.

8. In a transmission mechanism including a driving shaft, a driven shaft, a planet Carrier, interconnected planet pinions and sun gears associated with said shafts and said planet carrier for communicating the movement of said driving shaft to said driven shaft, a clutch for controlling said pinions and said gears, of a high speed driving mechanism comprising a. tubular extension projecting from said planet carrier, clutching means in said extension for controlling the rotation of said planet carrier for high speed drive only7 cam and pawl means for operating said clutching means, and a slidahle cam sleeve for actuating said cam and pavvl means.

In testimony whereof I have signed my name to this specification.

ARNOLD H. J ESSEN 

